St-3 Form Sc - Link to official form info: Please read this section before completing your form. Web filing your south carolina sales tax returns offline. While it is highly recommended that you file online using the south carolina. Upcoming due dates in the next year:* thursday feb 29,.
Link to official form info: Web filing your south carolina sales tax returns offline. Upcoming due dates in the next year:* thursday feb 29,. Please read this section before completing your form. While it is highly recommended that you file online using the south carolina.